TPS2559-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• Operating range: 2.5 V to 6.5 V

• Adjustable 1.2-A to 4.7-A I(LIMIT) (±4.4% at 4.7 A)

• Short-circuit shutoff (typical): 3.5 μs

• High-side MOSFET: 13 mΩ

• Maximum standby supply current: 2 μA

• Built-in soft-start

• System-level ESD capable: 8 kV / 15 kV

• UL 2367 recognition pending

2 Applications

• USB ports, hubs

• Digital TVs

• Set-top boxes

• VOIP phones

3 Description

The TPS2559 power-distribution switch is intended for

applications where a low resistance, precision current

limit switch is required or heavy capacitive loads are

encountered. The TPS2559 provides up to 5.5 A of

continuous load current with a precise current limit set

by a single resistor to ground. Output current is

maintained at a safe level by switching into a

constant-current mode when the output load exceeds

the current-limit threshold. During overload events the

output current is limited to the level set by R(ILIM). If a

persistent overload occurs, the device goes into

thermal shutoff to prevent damage to the TPS2559.

The power-switch rise and fall times are controlled to

minimize current surges during turn on or off. The

FAULT logic output asserts low during overcurrent or

overtemperature conditions.